eBay runs one of the world's largest online marketplaces - 136 million active buyers across 190-plus markets, roughly 2.5 billion live listings at any given time. That's an enormous attack surface: fraud rings gaming trust systems, credential-stuffing campaigns targeting millions of accounts, payment abuse at scale, and the constant pressure to keep listing integrity and buyer confidence intact. The threat model is broad, layered, and always evolving with the platform itself.
Security work at eBay spans the full e-commerce stack. That means defending marketplace platform infrastructure, hardening payment processing systems, securing personalized recommendation engines, and maintaining the integrity of search and listing pipelines. Teams operate across identity and access management, fraud detection and abuse prevention, application security, and cloud infrastructure security - domains where the blast radius of a miss is measured in real financial loss and eroded trust at massive scale.
Founded in 1995 and publicly traded, eBay is a mature technology company with decades of operational history. The security organization works within a business that handles billions of dollars in annual transaction volume, which means incident response isn't theoretical - it's operational reality. Roles here engage with large-scale distributed systems, data-driven risk models, and the kind of adversarial dynamics that come with being a high-value target where every buyer-seller interaction is a potential attack vector.
